Coupling.



' BEST AVA-\LABLE C PATENTED JULY 4, 1905.

R. G. MODOWBLL.

COUPLING.

APPLICATION FILED SBPT. :20v 1904.

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BEST AVA\LABLE 00F No; 794,110. I PATENTBD JULY 4, 1905.

R. G. MsDOWBLL.

COUPLING.

APPLIOATION FILED SEPT.20. 1904.

Z SHEETS-SHEET Z.

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ATTORNEYS ,T aZZ whmn it may concern.-

ROBERT eEoReE'M nowELL, or ANACONDA, MONTANA.

COUPLING. Y j 1;:

SPECIFICATION forming part of Letters Patent No. 794,110, dated. uly 4, 1905.

v 7 Application filed September 20, 1904. Serial No. 225,196.

Be it knownthat I, Ronnn'r GEORGE Mo- DOWELL, a citizen of the United States, and a resident of Anaconda, in the county of Deerlodge and State of Montana, have invented a new and ImprovedCoupling, of which the following is a full, clear, and exact description.

The invention relates to a coupling intended to join sections of pipes and hose and also for use'inconnecting nozzles. and fire-plugs and various other analogous uses The coupling comprises mating sections fitting one within the other, the coupling .hav-

ing apeculiar packing, making a hermetic I5 joint and the outer sectioncarrying a peculiar :1 spring dog capable of. projecting a part through anqopening in the outer section into engagement with a shoulder onthe'linner sectron, thus. removably yetsecurely holding the sections engaged.;- i A The.inventioniresidesjfin certain novel tea-- tures .bfconstructionj 1 and arrangement, the

particulars ofiwhich will be hereinafter fully set-forth,v andp'ointed out in the claims.

Reference is had-to the accompanying draW- ings, illustrating various forms of the inven tion, in which drawings like figures of refer a cross-section on the line 2 2 of Fig.1.

its preferred embodiment.

ence indicate like parts throughout the views, and in .which 1 Figure 1 is a view of the coupling with parts in section on the line 1 lot Fig. 2. Fig. 2 is Fig. 3 is a detail perspective of the spring-dog in Fig. 4C is an exterior elevational view of the coupling. Fig. 51S a sectional .view showing the coupling in connection with a hydrant-plug. Fig. 6 is a partly-sectional side view of a nozzle connec- Ttion employed. Fig. 7 is a side view of a modification, andhig. 8 is a transverse sectional 'view substantially on the line 8 8 in Fig. 7.

, Referring particularly to Figs. 1 to 4:, the outer section of the coupling comprises a body part 10 and a tubular extension 11, with which the hose or pipe section 12 is connected in any suitable manner. The body part 10 of the outer section has a groove 14 extending'partly around its outer side, and communicating with this grooveis an opening 1 1, which extends also has a cavity 14: in its outer surface, this strip 16 from its positioninviiardof the inner-5 a tubular body 18 and an eXtens'io nI19, and in '7 51 Y PatentedJuly 4 905.

inward eornpletely-throughthe bodylO off: the coupling. The body 10 of the coupling" cavity lying at and communicating with one j i end of the groove 14:. The spring-dog is pref-' crably formed of a flat metallic spring 16', onc-fir-w end of which is secured by'screws 17 or the like in one end'of the groove 14,, thespring' 16 extending through said groove andhaving; its end lyingoverthe cavity 14. The spring 16 6' has an inwardly-located strip 16, which preterably is struck or stamped from the sp in as shown in Fig. 3, said strip lying opposite the opening Ml'sothat' when thespring%do'g is in active position the strip projects through the opening 14" and lies inward of the inner. walls of the body1().1 By'inserting ones fin ger within the eavity'lA the spring-dog may jbe moved outward sufficiently to withdraw the surface of. the bed y 10, so as todisengage this-(Li part 16-of the dogfierntheinner mern I the coupling, as will ,be liei efiraftell ully set forth. The innerme'rnbe'rofsthe coupling has the said extension 19 thehosesectio-nflO is suitably fastened. The bodyfmemb" the inner coupling-section is intend: snugly into the body 10 of the 'outer cou' ling-section, and said body has an annular groove 21 extending around its outer surface and receiving a packing-gasket'22, of rubber or other equivalent material- Said body 18 has a series of openings 23 therein establishing communication between the interior of, 5 the body and the said groove 21, so that the fluid-pressure within the coupling and hosesections 12 and 20 may be exerted on the inner side of the gasket 22, forcing thesame outward in contact with the inner walls of the body 10 of the coupling,thusforming a hermetic connection between the two parts. The body .18 is provided with an annular groove 23 extending around its outer circumference g and adapted when the coupling-sectionsare 3 engaged to lie in transverse lines witi jfhe I groove 1th and opening 1-4:", so that whj m f spring-dog 16 is in its activeposition (it, i wardly-lyingstrip-or part 16 theree jccted through the opening 14: will L withv the wells of the said groove 23, :tnd thus lock the coupling-sections together. in the use of the invention the free end of the spring-dog 16 should be moved outward 5 in the manner before explained. so as to bring the part 16 of the dog out ofits position inward of the inner surface of the outer coupling-section. Then the two coupling-sections may be engaged together, as shown in Fig. 1, and upon permitting the spring-dog to return to its active position the part 16" of snid dog will engage with the walls oi. the gri'iovc 23,.thusloclri'ng the sections together. it will be observed that this arrangement atfords a secure connection between the sections, while the gasket 22 mnltes that connection hermetic. 1

in Fig. .1. For instance, it may be employed to conuectthe plug or stopper of a lire-hydrant. This l a ter'errangement is shown in Fig. 5, F in which the firehydrn nt plug 2 forms the outer member of the coupling and is arranged to operatelwith the inner member attached to a fire-hose hnd constructed as shown in Fig. 1. :5"25 indicates the stopper, which'fits loosely in the ining and is held by the screw-cap 26. Said "f ste iper is provided with a gasket 27, the same as the giflifii "22'filf Flg. 1. I

Fig. 6 illustrates-ithe inner member of the coupling,- provided with a threaded neck 28, enabling it to be engaged with a nozzle.

Figs. 7 and 8 illustrate the couplingwith a rouudspring .39 operating'in place of. the fiatspring 16. .(Shown iii-Fig. 1.)

Varicos -changes in the form, proportions,

' BEST AVAlLABLE cop and minor details of my invention may he re sorted to at will without departing from the spirit and scope thereof. l'lence iconsider myself entitled to all such veriutions as may lie within the terms of my claims.

Having thus described my invention, 1 claim as new and desire to secure by Lette l-fntent-- 1. Thecombination of two con pling-secfirms adapted to it one within the other, the outer coupling-section lmving un opening-extending through it, and the inner. coupling secdon having a shoulder and n spring-dog secui d on the outer section and extending around tlv outer side oftheseid section, said dog having an inwardlyprojecting portion adapted to project through the opening in the outer section into engagement with the shoulder on the inner section.

2. The combiu ition of two coupling-sections adapted to lit one within the other, the outer section hnving z-mopening therein, and the inner section h; ring it shou der, a dog formed of a flat spring secured to the outer side of the outer section and having a strip struck therefrom, said strip lying inward of the dog "and adapted to extend through the opening of the outer section into engagement with the said shoulder on the inner section.

3. The combination o't'two co upling-scctions adapted to fit one within the other, the outer section having an external groove, an opening in the groove, and it recess at one end of said groove, and the inner section having an annular groove, and a. spring secured at one end in the groove and having its other end resting in the recess, the spring being provided intermediate of its ends with an inwardly-projecting portion entering the said openin In testimony whereof I have signed my name to this Specification in the presence oi two sub' scribing witnesses.

RJBERT GEORGE MCDOWELL.

1V itnesscs: M. J. Frrz PATRICK, ILLRRY NEAL. 

